using UnityEngine;
using System.Collections;
using UnityEngine.EventSystems;
public class EventTriggerListener : UnityEngine.EventSystems.EventTrigger
{
    public delegate void VoidDelegate(GameObject go);
    public delegate void BoolDelegate(GameObject go, bool state);
    public delegate void FloatDelegate(GameObject go, float delta);
    public delegate void VectorDelegate(GameObject go, Vector2 delta);
    public delegate void ObjectDelegate(GameObject go, GameObject obj);
    public delegate void KeyCodeDelegate(GameObject go, KeyCode key);

    public VoidDelegate onClick;
    public VoidDelegate onLeftDown;
    public VoidDelegate onRightDown;
    public VoidDelegate onEnter;
    public VoidDelegate onExit;
    public VoidDelegate onUp;
    public VoidDelegate onSelect;
    public VoidDelegate onUpdateSelect;

    static public EventTriggerListener Get(GameObject go)
    {
        EventTriggerListener listener = go.GetComponent<EventTriggerListener>();
        if (listener == null) listener = go.AddComponent<EventTriggerListener>();
        return listener;
    }

    static public EventTriggerListener Get(Transform transform)
    {
        EventTriggerListener listener = transform.GetComponent<EventTriggerListener>();
        if (listener == null) listener = transform.gameObject.AddComponent<EventTriggerListener>();
        return listener;
    }
    public override void OnPointerClick(PointerEventData eventData)
    {
        if (onClick != null) onClick(gameObject);
    }
    public override void OnPointerDown(PointerEventData eventData)
    {
        // Debug.Log("eventData.button:" + eventData.button);
        if (eventData.button == PointerEventData.InputButton.Left)
        {
            if (onLeftDown != null) onLeftDown(gameObject);
        }
        else if (eventData.button == PointerEventData.InputButton.Right)
        {
            if (onRightDown != null) onRightDown(gameObject);
        }
    }
    public override void OnPointerEnter(PointerEventData eventData)
    {
        if (onEnter != null) onEnter(gameObject);
    }
    public override void OnPointerExit(PointerEventData eventData)
    {
        if (onExit != null) onExit(gameObject);
    }
    public override void OnPointerUp(PointerEventData eventData)
    {
        if (onUp != null) onUp(gameObject);
    }
    public override void OnSelect(BaseEventData eventData)
    {
        if (onSelect != null) onSelect(gameObject);
    }
    public override void OnUpdateSelected(BaseEventData eventData)
    {
        if (onUpdateSelect != null) onUpdateSelect(gameObject);
    }
}